How to Use a Compass – The Modern Adventurer’s Guide

We’ve seen an unsettling trend lately whereby people get themselves lost at a remote trailhead, nervously watching as their smartphone battery quickly drains in the cold and unsure of what to do next. 

Don’t get us wrong – digital mapping tools can be incredibly powerful, but they are also fragile and highly vulnerable to signal loss deep in the backcountry. Relying solely on a screen can leave you exposed to too many variables, which is a situation you don’t want to find yourself in miles away from home.

However, there’s an easy fix for that – the physical baseplate compass. A compass doesn't need a charge and won't lose its connection under heavy tree cover. At the same time, learning to read a magnetic needle will keep your confidence high in case you veer off the marked trail.

In this guide, we’ll share with you how to master old-school navigation to complement modern-day GPS tech so that you get the best of both worlds, and more importantly – get safely back home.

Let’s begin!

Key Takeaways

• A baseplate compass is a technical tool that translates magnetic fields into a reliable walking path.
• The "Red in the Shed" mnemonic remains the universal standard for aligning your magnetic needle with your intended bearing.
• Take your compass to a local park or familiar trail to practice taking field bearings before attempting a deep-wilderness trek.
• Physical orientation often involves kneeling or movement on rugged terrain, making technical gear ergonomics a key consideration.
  

A Closer Look at the Baseplate Compass

Wilderness navigation starts with knowing your equipment. A standard baseplate compass is built for map work and quick field readings. Every piece of compass anatomy serves a specific function to keep you on the right course.

Here are the five critical compass components you need to master to always know where you’re headed:

1. Baseplate: The clear plastic chassis housing the compass. It features straight edges for drawing map lines and a ruler for measuring distances.
   
2. Magnetic needle: The free-spinning needle inside the housing. The red end always points to the magnetic north.
   
3. Rotating bezel: The circular dial surrounding the needle. It's marked with 360 degrees and the four primary cardinal directions, allowing you to dial in a specific heading.
   
4. Orienting arrow: The fixed outline arrow printed on the bottom of the rotating bezel. This is commonly called "The Shed" and rotates when you turn the dial.
   
5. Direction of travel arrow: The large arrow printed at the top of the baseplate. It shows you exactly which way to walk.

Selecting the Right Compass Type for Your Terrain

Different environments require different orienteering tools. We recommend that you choose a compass that matches your specific route and map requirements.

Compass Style	Best Use Case	Key Features
Baseplate compass	Beginners and standard map navigation.	Clear plastic body, easy map alignment, lightweight.
Mirror compass	Long-distance accuracy and emergency signaling.	Sighting mirror, highly precise field bearings.
Lensatic compass	Military-style sighting without a map.	Heavy metal build, precise aiming slits, no clear baseplate.

A standard baseplate compass tends to remain the best choice for most hikers. It sits flat on a topographic map so you can clearly see grid lines underneath the tool. For a look at other available compass types, please refer to the table above.

Mastering the Step-by-Step Navigational Process

Follow these exact steps to use your compass as intended:

1. Hold the compass flat in your palm so the needle spins freely, and point the direction of the travel arrow straight ahead toward your destination.
   
2. Turn the rotating bezel until the orienting arrow lines up directly under the red end of the magnetic needle. The red needle is now said to be "in the shed."
   
3. Look down at the index line on your dial to read your exact degree heading. Keep the red needle in the shed and walk in the direction of the large travel arrow.
   

The "Dial, Shed, Walk" Approach

If those steps feel like a lot to memorize while you're out on the trail, you can also follow the established "Dial, Shed, Walk" mnemonic.

• Dial: look at your map or your target destination, choose your desired direction, and dial that exact degree heading into your rotating bezel using the index line.
  
• Shed: hold the compass flat in front of your chest. Turn your entire body – not just the compass – until the red, magnetic end of the needle slips perfectly inside the outline of the orienting arrow. You have now put “the red in the shed.”
  
• Walk: look up, find a physical object (like a unique tree or rock) 50 to 100 feet ahead that lines up with your travel arrow, and simply start walking. Once there, repeat this step as many times as needed until you’ve reached your final destination.
  

Pro tip: Make sure not to stare down at the needle while you walk, or you'll inevitably trip over a root!

Taking a Field Bearing from a Landmark

Sometimes, you’ll need to lock in a route without looking at a map. Sighting a landmark involves picking a prominent physical feature like a mountain peak and recording its exact location relative to your position.

To do this:

1. Hold the compass level in front of your chest to prevent the needle from dragging.
   
2. Point the direction of the travel arrow straight at the peak.
    
3. Turn the dial until the red needle sits perfectly inside the orienting arrow to align with magnetic north.

Congratulations! You have now captured a field bearing, technically referred to as an "azimuth". You can also read the exact degree number at the index line. This locks the bearing into the housing so you can walk toward that landmark even if thick fog rolls in and obscures your view.

Advanced Field Bearing Tips

If you take bearings from two or three different landmarks and draw those lines on your map, the point where they intersect will show your exact physical location. This advanced map technique is known as triangulation. And if you ever need to retreat back to safety, you can calculate a back bearing by adding or subtracting 180 degrees from your current heading to retrace your exact steps.

Adjusting for Magnetic Declination and True North

It’s worth noting that your map and compass point to two different norths. Topographic maps use geographic north – also known as true north – which perfectly aligns with the North Pole. Your magnetic needle, on the other hand, points to a shifting location dictated by the earth's magnetic fields.

The difference between these two points is called magnetic declination. If you ignore this magnetic offset, a minor degree calculation error can push you miles off course over a long distance. To avoid this, you would have to apply a declination adjustment to your compass before stepping on the trail.

The exact degree offset depends on your physical location and changes over time based on the World Magnetic Model (WMM). Once calculated, you will then need to adjust the declination scale on your compass housing to match the required degrees east or west.

To calculate and apply magnetic declination based on your text, you need to find the difference between True North and Magnetic North for your specific area, and then adjust your compass.

Calculating a Magnetic Declination

Here is the clear, concise step-by-step process to do it:

1. Find your local declination value. Because declination changes based on your location and time, you cannot really guess it. Instead, you need to look it up using one of two ways:

• Your map: look at the margin of your topographic map for the declination diagram (usually a diagram with two or three lines showing true north and magnetic north).
  
• Online/WMM: Visit a trusted site like NOAA (National Oceanic and Atmospheric Administration) or use a WMM-based GPS app to get the exact, current degree offset for your coordinates.

2. Identify your direction (East vs West). Your lookup will give you a specific number of degrees and a direction – either East or West.

• If East declination: magnetic north is to the right (East) of true north.
  
• If West declination: magnetic north is to the left (West) of true north.

3. Adjust your compass accordingly. Most modern topographic compasses have an adjustable declination scale (it’s typically done through a small screw on the housing that turns the inner orientation arrow).

• East declination: turn the adjustment screw so that the orienting arrow shifts to the East (clockwise) by the correct number of degrees.
  
• West declination: turn the adjustment screw so that the orienting arrow shifts to the West (counter-clockwise) by the correct number of degrees.

Once this adjustment is set, your compass will then handle all of the math for you. When you align the magnetic needle with the orienting arrow, your compass housing will also align with true north, matching your map perfectly.

Integrating Your Compass with Topographic Maps

Field bearings may keep you moving, but pairing your tool with a topographic map is the thing that gives you true peace of mind. A map gives you a complete view of the terrain, so aligning the compass with the map grid lines allows you to easily translate paper routes into physical steps.

Follow these five map rules for successful compass and map navigation:

1. Always orient your map to the North first before taking a reading.
2. Adjust for your local magnetic declination before plotting a course.
3. Keep the map flat and level on the ground or your knee.
4. Match prominent map features to real-world landmarks to verify position.
5. Trust your compass over your intuition when disorientation sets in.

Common Beginner Mistakes to Avoid

Here’s something people don’t often tell you – holding a compass perfectly level can be surprisingly difficult when your hands are shaking in freezing, windy field conditions. If you tilt the baseplate, you can create a "lazy needle" that drags against the housing and gives you a false reading.

Magnetic interference is another invisible trap. We once spent an hour walking off-route because one of us was holding the baseplate too close to their heavy metal belt buckle. Additionally, modern hikers need to also be highly aware of things like smartwatch and smartphone interference pulling the needle off course.

Navigational errors also happen when crossing the equator. Standard needles are balanced for specific hemispheres, so they will drag if taken to the opposite side of the globe. If you’re prone to doing international treks, we recommend investing in a global needle to prevent this issue.

What to Wear as You Navigate the Wilderness

Navigation is a highly physical act. Throughout your adventures, you may frequently find yourself dropping to one knee to ground-orient a topographic map or scrambling through a heavy brush as you try to find your bearings. Here, pants with an articulated fit and gusseted crotches, like the KÜHL RYDR™ or RENEGADE™, can help you freely move forward without fighting your own clothing.

Beyond pure mobility, KÜHL also takes care to use mountain-born hardware designed for the backcountry. This can help reduce unnecessary interference near your compass, though you should still keep any metal hardware away from it while it’s being used.

Featured image by: maxbelchenko.